JP2657231B2 - Shoe wipe mat - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe wiping mat, and more particularly to a shoe wiping mat used in combination with a mat base and a pile thread implant mat.

(Prior art)

Recently, rental shoe wiping mats have become widespread, mainly at the entrances of stores and offices. In such a shoe wiping mat, mineral oil is applied to the plant pile yarn, and the pile yarn has a dust collecting function. In the rental system, the shoe wipe mat is delivered to each user's store, used in the store, collected, washed, the dust collection function is regenerated,
A system such as delivery to each user store has been taken again.

In such a rental mat, as a frequent carrying work such as delivery and collection, an assembling shoe wiping mat capable of separating a mat base and a mat on which pile yarn is planted has been considered, and a lightweight mat has been considered. There is a system that requires only mat transportation. A frame-shaped projection is formed on the mat base of the assembled shoe wiping mat, and the mat is stored and held by the projection so as not to shift. Furthermore, a pair of locking elements, such as a base cloth and a locking piece, are provided between the mat base and the mat so that the mat is not rubbed violently with a shoe sole or the like and does not easily move in and out of many people. A magic tape (Velcro fastener) is provided. The magic tape is composed of a base fabric on which hook-shaped fibers (locking pieces) are planted and a base fabric on which loop-shaped fibers are planted. These are bonded to a mat base and a mat, respectively. The locking element is bonded by heat bonding, an adhesive or the like, and the mat and the locking element are sewn. Polyamide-based or polyester-based resin is used for the base fabric material and the hook-shaped or loop-shaped fiber.

In addition, the mat base is permanently installed at the entrance of the store, and when a dust collecting function is required, a processing liquid such as mineral oil is applied to the mat installed on the mat base in a processing step as needed. In order to use this method stably for a long period of time, a material having excellent oil resistance, abrasion resistance, dimensional stability, and light resistance is selected.For example, a nitrile-butadiene rubber-based material is excellent in these characteristics. It is used as a base material because it is excellent in processing and economy.

[Problems to be solved by the invention]

However, in such a conventional shoe wipe mat,
The adhesion between the mat base and the base fabric of the locking element is unexpectedly poor, and there is a problem that the magic tape as the locking element is detached from the mat base over time or each time the rental system is reused.

The present invention has been made in view of such circumstances, and has as its object to provide a shoe wiping mat that can be used for a long period of time by increasing the adhesive strength between a mat base and a locking element.

[Means for solving the problem]

ADVANTAGE OF THE INVENTION According to this invention, the mat base in which the frame-shaped protruding edge was formed, the pile system which applied the oil agent for dust collection was planted, and the mat which is detachably accommodated in the frame of the said mat base Between the mat base and the mat, and a locking element comprising a base cloth having a hook-shaped locking piece implanted therein and a locking element comprising a base cloth having a loop-shaped locking piece implanted therein. A shoe wiping mat wherein the elements are mounted oppositely on each side, said mat base comprising a nitrile-
Butadiene rubber 90 to 50% by weight and chlorine containing resin 10 to
50% by weight of a mixture, a base fabric surface on the mounting side of the locking element to be mounted on the mat base is formed of a polyamide resin, and a backing layer made of polyurethane resin is provided. A shoe wiping mat characterized in that the surface of the stop element and the base cloth surface are thermally bonded with a chlorine-containing resin interposed therebetween.

[Action]

According to the present invention, the heat-bonding is performed by interposing a chlorine-containing resin sheet between the nylon surface of the base fabric of the locking element and a mixture obtained by mixing the nitrile-butadiene rubber of the mat base and the chlorine-containing resin in a specific quantitative ratio. , High adhesive strength, water resistance,
This is based on the finding that a heat-bonded portion having excellent oil resistance can be formed.

Generally, when thermal bonding is performed between the locking element and the rubber of the mat base, the thermal bonding is performed under a temperature condition at which the rubber sheet melts, although the base fabric of the locking element does not melt. This is because, under the condition that the base cloth of the locking element is melted, the locking piece comes off with a relatively small force.

When adhesively bonded to a mat base made of a nitrile-butadiene rubber and a locking element based on nylons, only a small adhesive strength is obtained, and the heat-bonded portion is inferior in water resistance and oil resistance (Comparative Example 1 described later). This is because both polymers have high and similar solubility indices (SP values), and they are unlikely to be entangled or interacted with each other when the nylons are not melted. Can be

On the other hand, thermal bonding is performed by interposing a chlorine-containing resin sheet between the nylon surface of the base fabric of the locking element and a mixture obtained by mixing the nitrile-butadiene rubber of the mat base and the chlorine-containing resin at a specific ratio. In this case, the adhesive strength is improved about twice or more, and the decrease in the strength when contacted with water and oil is also significantly suppressed. The reason for this is unknown, but it is considered that the compatibility between the chlorine-containing resin and the nitrile butadiene rubber is good, and the chlorine-containing resin forms a stronger adhesive bond to nylons than the nitrile butadiene rubber. .

(Preferred embodiment of the invention)

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partial perspective view of a shoe wiping mat according to the present invention. As shown in FIGS. 1 and 2, the mat base 12 of the shoe wiping mat 10 is formed in a rectangular shape. Mat base
12 is not limited to a rectangular shape, but may be a circular shape, an elliptical shape, or the like. A protruding edge 14 is formed around the periphery of the mat base 12, and a mat 16 is accommodated in the protruding edge 14. The mat 16 as shown in FIG.
The woven fabric 18 includes a woven fabric 18, a pile yarn 20 formed by tufting fibers of the woven fabric 18 and trimming the ends thereof, and a backing layer 22 for fixing the pile yarn 20 to the woven fabric 18.

A locking element 24 is attached to the mat base 12 as shown in FIGS.
And hook-shaped locking pieces 28, 28, implanted in the base cloth 26, ...
…. The base cloth 26 is made of a polyamide fiber or the like, and the locking piece 28 is fixed to the base cloth 26 with its base crushed.

On the other hand, as shown in FIG. 3, a locking element 30 is attached to the back surface of the mat 16 by a thread 32 facing the locking element 24, and the locking element 30 is fused to the loop-shaped locking piece 34. And a base cloth 26. These pair of locking elements 24, 30 have a temporary locking function and are generally known by the name of Velcro,
For example, it is commercially available under the trade name Velcro Fastener. The pair of locking elements 24 and 30 are mat-based.
It can be attached to multiple places of 12 and mat 16.

Nitrile-butadiene rubber base material is used for the mat base 12. Nitrile-butadiene rubber can withstand outdoor exposure, water or hot water, hot oil, dimensional stability, abrasion resistance, and light resistance. Is also excellent. For this reason, nitrile-butadiene rubber is a preferable material when used for long-term permanent use such as rental mats. Further, the mat base 12 may be made of nitrile-butadiene rubber as a base and mixed with a vinyl chloride resin or a vinylidene chloride resin as a chlorine-containing resin. This is to enhance the thermal adhesion to the locking element 24 described later. The compounding amounts of the nitrile-butadiene rubber and the mixture thereof are in the range of 90 to 50% by weight for the nitrile-butadiene rubber, and in the range of 10 to 50% by weight for the vinyl chloride resin or the vinylidene chloride resin. More preferably, the compounding amount of the nitrile-butadiene rubber and these mixtures is such that the nitrile-butadiene rubber is
It is in the range of 85 to 60% by weight, and the content of vinyl chloride resin or vinylidene chloride resin is in the range of 15 to 40% by weight.

When the mating amount of this mixture is larger than the above range, the properties of the nitrile-butadiene rubber are lost, and the dimensional stability, abrasion resistance and the like are deteriorated. Further, if the amount of the mixture is small, the effect of the thermal adhesion to the locking element 24 is reduced.

The woven fabric 18 of the mat 16 may be a general cloth, a plastic net, or the like.
A latex of nitrile-butadiene rubber is applied and dried as a backing layer. The pile yarn may be a spun yarn or a multifilament yarn made of one or a combination of two or more of cotton fiber, rayon, polyvinyl alcohol fiber, acrylic fiber, nylon fiber and the like.

Further, the pile yarn 20 is applied or impregnated with a dust adsorbing liquid to collect dust adhering to the shoe sole or the like by rubbing against the shoe sole or the like. Examples of the adsorptive liquid include mineral oils such as liquid paraffin, spindle oil, alkylbenzene, castor oil, synthetic oils and vegetable oils,
Aqueous dust adsorbents described in 10194 and 53-37471 can be mentioned.

The locking piece 28 of the locking element 24 is made of nylon or polypropylene or the like, and is rooted and implanted in nylon fiber or other synthetic thermoplastic fiber. In some cases, the opposite surface is backed with a polyurethane resin or the like. The base cloth 26 of the locking element 24 may thus be composed of nylon fibers and polyurethane resin. As such a polyurethane resin, a polyurethane resin whose terminal isocyanate group is blocked with an alcohol, phenol, amine or the like, that is, a heat-sensitive adhesive urethane resin is preferable. The polyurethane resin material is a preferable material because the locking piece 28 is easily implanted and fixed. Also, the same material as the locking element 24 is used for the locking element 30.

Adhesion between the locking element 24 and the mat base 12 The mat base 12 is connected to the locking element 24 via a chlorine-containing resin 36.
And heat-bonded easily by pressing under heat with a pair of heat seal bars. The chlorine-containing resin may be dissolved in a solvent or the like and applied between the locking element 24 and the mat base 12, but the chlorine-containing resin may be formed into a sheet shape and thermally bonded with the sheet interposed therebetween. . In the case of such a sheet, the chlorine-containing resin or the like is uniformly interposed between the locking element and the mat base, and exhibits a sufficient effect. When such a resin or sheet is used, the resin acts as an adhesive, and the adhesive strength between the mat base and the locking element increases.
Even when immersed in warm water at a temperature of 60 ° C. for 7 days, the locking element does not peel off, and is superior to the conventional bonding method.

As the chlorine-containing resin to be used, vinyl chloride homopolymer or copolymer, vinylidene chloride resin, chlorinated polyethylene, chlorinated polypropylene, chlorinated vinyl chloride resin, chloroprene rubber and the like are used, and vinyl chloride resin is most preferable.

Of course, these chlorine-containing resins can be blended with a heat stabilizer such as an organotin compound, a soap residue, or a plasticizer such as dioctyl phthalate or an epoxy plasticizer in accordance with a formulation known per se.

Further, a sheet having a thickness of 0.1 mm to 2 mm is used as the resin sheet, and a sheet having a thickness of 0.2 mm to 1 mm is preferably used. If the thickness is small, sufficient adhesive strength cannot be increased. On the other hand, if the thickness is too large, there is a problem that heat sealing cannot be performed sufficiently.

The heating temperature should be higher than the softening temperature of the polymer constituting the mat base and lower than the melting point or softening point of the base fabric of the locking element and the vinyl chloride resin. Pressure such that the pieces are crushed or pushed in,
For example, a pressure of 0.1 to 20 kg / cm ² (gauge) is applied. However, the locking element is mainly pressurized at a part of the periphery and the center. The heating can be performed with a high-frequency welder.

Further, there is a method in which a polyurethane resin, which is a backing layer of the base fabric of the locking element 24, is used as a polyurethane adhesive for thermal bonding between the locking element and the mat base. As such a method, a block isocyanate and a polyester or polyether, each of which is a solid, are mixed in advance in a reaction equivalent ratio, and are melted at a relatively low temperature sufficient for melting the mixture, for example, 95 ° C or lower, on the back surface of the locking element. After applying the mixture, the locking element melt-coated with the mixture was placed in contact with the mat base surface at a predetermined position so that the coating surface was in contact with the mat element, and 0.1 to 20 kg / cm.
Approx. 180 to 185 ° C by high frequency heating at ² (gauge) pressure
If instantaneous heating is performed, the blocked isocyanate dissociates and reacts instantaneously with the coexisting polyester or polyether to form polyurethane, which is tightly bound to vinyl chloride or the like, and can exhibit a strong adhesive effect.

According to the method according to the present invention, with respect to the locking element to the mat base surface, the locking element coated with the blocked isocyanate and polyester polyol on the back surface in advance is brought into close contact with a predetermined position of the vinyl chloride resin sheet at 2 kg / cm ² gauge pressure. When heated to 185 ° C. for 5 seconds by high frequency heating while pressing, the locking element was completely bonded and exhibited a peel strength of 20 kg or more.

In order to apply the block isocyanate / polyester or polyether on the back surface of the locking element, it is also possible to dissolve in a solvent such as ethers (tetrahydrofuran), ketones (methyl ethyl ketone), etc. in addition to melt coating and evaporate the solvent after application. The effect of is obtained. The addition of cobalt octenoate is effective in promoting the thermal dissociation of the blocked isocyanate and the subsequent reaction.

 In addition, 4,4'-
Of diisocyanate / diphenylmethane and xylenol
Block body (Coronet manufactured by Nippon Polyurethane Industry Co., Ltd.)
G MS50), also 4,4'-diisocyanate dife
Bromine of nilmethane with methyl ethyl ketone oxime
Pack or trimethylolpropane / tolylene ii
To 2,4-dichlorophenol in the adduct of socyanate
Blocks can be used effectively, especially methyl ethyl
Blocks made of ketones and oximes are dissolved by high-temperature heating.
No odors such as phenol when released
This is preferable.

 Active hydrogen compound to react with blocked isocyanate
As any of polyester, polyether, etc.
Good, but a solid polymer with a relatively low melting point is advantageous
For example, as polyesters, Bayer De
Smophen650, Polycaprola of Daicel Chemical Industries, Ltd.
Kuton Placcel and Nihon Polyurethane Industry Co., Ltd.
Tuporan Etc. can be used effectively, and as polyethers
Is pluronic polyols from Wysndotte Chem. Corp.
Products with a melting point of about 50 ° C. are advantageous.

〔Example〕

 Hereinafter, examples of the present invention will be described in detail.

(Example 1) Materials used Mat base; nitrile-butadiene rubber 70% by weight /
100 parts of vinyl chloride 30% by weight, 60 parts of SRF carbon, 50 parts of hard clay, 35 parts of DOP, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of 2,6-ditetrabutyl paracresol , 1 part of paraffin, accelerator N-cyclohexyl-
Produced by blending 2 parts of 2-benzothiazylsulfenamide, 2 parts of accelerator tetramethylthiuram disulfide and 0.5 parts of sulfur.

Locking element: polyurethane resin is used for the backing layer of the locking element.

Intermediate sheet: Use a 0.3 mm thick vinyl chloride sheet.

Thermal bonding method Thermal bonding was performed with a high frequency welder with the vinyl chloride sheet interposed therebetween, under the following conditions: 210 V, 0.7 A; 7 seconds; tuning adjustment 6.1; gauge pressure 4 kg / cm ² .

Evaluation method In an atmosphere at a temperature of 20 ° C. or 60 ° C., a mat base in which ten locking elements were bonded to air, water, and spindle oil, respectively, was immersed for 7 days, and then autographed with an Autograph IM-100 (manufactured by Shimadzu Corporation). A peeling test (peeling speed; 200 mm / mim.) Was performed. The results are shown in Table 1 below.

As a result, in the severe test at a temperature of 60 ° C., the locking element did not easily peel off, and had sufficient adhesive strength.

(Example 2) Material used Mat base; nitrile-butadiene rubber 85% by weight /
100 parts of 15% by weight of vinyl chloride;
And the same formulation.

Locking element: polyurethane resin is used for the backing layer of the locking element.

Intermediate sheet: Use a 0.5 mm thick vinyl chloride sheet.

Thermal bonding method Thermal bonding was performed with a high frequency welder with the vinyl chloride sheet interposed therebetween, under the following conditions: 210 V, 0.7 A; 7 seconds; tuning adjustment 6.1; gauge pressure 4 kg / cm ² .

Evaluation method In an atmosphere at a temperature of 20 ° C. or 60 ° C., a mat base in which ten locking elements were bonded to air, water, and spindle oil, respectively, was immersed for 7 days, and then autographed with an Autograph IM-100 (manufactured by Shimadzu Corporation). A peeling test (peeling speed; 200 mm / mim.) Was performed.

 The results are shown in Table 2 below.

As a result, in the severe test at a temperature of 60 ° C., the locking element did not easily peel off, and had sufficient adhesive strength.

(Comparative Example 1) Materials used Mat base; 100 parts of nitrile-butadiene rubber,
Other compounding agents were manufactured in the same compounding as in Example 1.

Locking element: backing layer polyurethane resin of the locking element is used.

 Intervening sheet; none.

Thermal bonding method Thermal bonding is performed using a high-frequency welder and the conditions are 210V, 0.7A; 7
Second: tuning adjustment 6.1; gauge pressure 4 kg / cm ² .

Evaluation method In an atmosphere at a temperature of 20 ° C. or 60 ° C., a mat base in which ten locking elements were bonded to air, water, and spindle oil, respectively, was immersed for 7 days, and then autographed with an Autograph IM-100 (manufactured by Shimadzu Corporation). A peeling test (peeling speed; 200 mm / mim) was performed.

 The results are shown in Table 3 below.

As a result, the strength in the standard state was low, and in the severe test at a temperature of 60 ° C., the locking element was easily peeled off and did not have sufficient adhesive strength.

(Comparative Example 2) Material used Mat base; nitrile-butadiene rubber 80% by weight /
100 parts by weight of 20% by weight of vinyl chloride, and other compounding agents were prepared in the same compounding as in Example 1.

Locking element: polyurethane resin is used for the backing layer of the locking element.

 Intervening sheet; none.

Thermal bonding method Thermal bonding is performed using a high-frequency welder and the conditions are 210V, 0.7A; 7
Second: tuning adjustment 6.1; gauge pressure 4 kg / cm ² .

Evaluation method In an atmosphere at a temperature of 20 ° C. or 60 ° C., a mat base in which ten locking elements were bonded to air, water, and spindle oil, respectively, was immersed for 7 days, and then autographed with an Autograph IM-100 (manufactured by Shimadzu Corporation). A peeling test (peeling speed; 200 mm / mim.) Was performed.

 The results are shown in Table 4 below.

Sufficient strength was obtained in the standard condition, but the strength was drastically reduced by immersion in water, and markedly decreased by immersion in water and oil under severe conditions at a temperature of 60 ° C.

[Effects of the Invention] As described above, according to the shoe wiping mat according to the present invention, the locking element adhered to the mat base has an adhesive strength superior to conventional ones such as water resistance and oil resistance. Also, when used as a mat base for rental mats for a long period of time, sufficient adhesive strength can be maintained in terms of durability.

[Brief description of the drawings]

1 is a partial perspective view of a shoe wiping mat according to the present invention, FIG. 2 is a cross-sectional view taken along line AA of the mat base of FIG. 1, and FIG. 3 is BB of the mat of FIG. It is sectional drawing along the line. 10 …… Shoe wiping mat, 12 …… Mat base, 14 …… Protrusion, 16 …… Mat, 20 …… Pile thread, 24, 30 …… Locking element, 26 …… Basic cloth, 28 …… Hook shape Locking piece, 34: Loop-shaped locking piece, 36: Chlorine-containing resin.

Claims (1)

(57) [Claims] 1. A mat base on which a frame-shaped protruding edge is formed, and a pile system on which a dust collecting oil agent is applied is implanted, and is detachably housed in a frame of the mat base. A locking element comprising a base cloth having hook-shaped locking pieces implanted therein, and a locking element comprising a base cloth having loop-shaped locking pieces implanted between the mat base and the mat. Wherein the mat base is made of a mixture of 90 to 50% by weight of a nitrile-butadiene rubber and 10 to 50% by weight of a chlorine-containing resin, and is attached to the mat base. The base fabric surface on the mounting side of the locking element to be formed is made of polyamide resin,
A shoe wiping mat provided with a backing layer made of a polyurethane resin, wherein the mat base and the base fabric surface of the locking element are thermally bonded with a chlorine-containing resin interposed therebetween.